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hub center bore

This is a discussion on hub center bore within the Wheels and Tires forums, part of the General Help category; I am trying to find the correct 30mm spacer with it's own studs for my car. I have been searching ...

  1. #1
    Moderator 98TransAmWs-6's Avatar
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    hub center bore

    I am trying to find the correct 30mm spacer with it's own studs for my car. I have been searching but have been unable to find the front hub center bore measurement. I was wondering what the center bore of the front hub was? I have found things that said 70.3mm and 70.5mm but I want to double check what it is. If no one knows, then how do you measure it, from outside to outside or inside to inside?
    1998 Trans Am WS6 - Phantom
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  2. #2
    Smiles for 9.5 Years cammed goat's Avatar
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    I could be wrong, but I believe it is outside to outside.

  3. #3
    Moderator 98TransAmWs-6's Avatar
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    Okay that is what I thought. I am thinking I will need a digital caliper to get the accurate measurement unless someone knows what it is or where I can find such information.

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